libresman

annotate examples/imgthumbs/src/thumbs.c @ 22:174ddb6bf92a

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separated platform-specific filewatch code
author John Tsiombikas <nuclear@member.fsf.org>
date Wed, 12 Feb 2014 22:32:30 +0200
parents c6073bf9fd38
children
rev   line source
nuclear@1 1 #include <stdio.h>
nuclear@1 2 #include <stdlib.h>
nuclear@1 3 #include <string.h>
nuclear@1 4 #include <errno.h>
nuclear@11 5 #include <assert.h>
nuclear@1 6 #include <dirent.h>
nuclear@1 7 #include <imago2.h>
nuclear@1 8 #include "opengl.h"
nuclear@1 9 #include "thumbs.h"
nuclear@11 10 #include "resman.h"
nuclear@1 11
nuclear@11 12 static int load_res_texture(const char *fname, int id, void *cls);
nuclear@11 13 static int done_res_texture(int id, void *cls);
nuclear@11 14 static void free_res_texture(int id, void *cls);
nuclear@11 15
nuclear@20 16 struct resman *texman;
nuclear@20 17 int dbg_load_async = 1;
nuclear@11 18
nuclear@1 19 struct thumbnail *create_thumbs(const char *dirpath)
nuclear@1 20 {
nuclear@1 21 DIR *dir;
nuclear@1 22 struct dirent *dent;
nuclear@13 23 /* allocate dummy head node */
nuclear@13 24 struct thumbnail *list = calloc(1, sizeof *list);
nuclear@21 25 char *env;
nuclear@21 26
nuclear@21 27 if((env = getenv("RESMAN_LOAD_ASYNC"))) {
nuclear@21 28 dbg_load_async = atoi(env);
nuclear@21 29 }
nuclear@1 30
nuclear@11 31 if(!texman) {
nuclear@11 32 texman = resman_create();
nuclear@11 33 resman_set_load_func(texman, load_res_texture, 0);
nuclear@11 34 resman_set_done_func(texman, done_res_texture, 0);
nuclear@11 35 resman_set_destroy_func(texman, free_res_texture, 0);
nuclear@2 36 }
nuclear@2 37
nuclear@1 38 if(!(dir = opendir(dirpath))) {
nuclear@1 39 fprintf(stderr, "failed to open directory: %s: %s\n", dirpath, strerror(errno));
nuclear@1 40 return 0;
nuclear@1 41 }
nuclear@1 42
nuclear@1 43 while((dent = readdir(dir))) {
nuclear@18 44 struct img_pixmap img;
nuclear@1 45 struct thumbnail *node;
nuclear@1 46
nuclear@1 47 if(!(node = malloc(sizeof *node))) {
nuclear@1 48 perror("failed to allocate thumbnail list node");
nuclear@1 49 continue;
nuclear@1 50 }
nuclear@11 51 memset(node, 0, sizeof *node);
nuclear@1 52
nuclear@1 53 if(!(node->fname = malloc(strlen(dirpath) + strlen(dent->d_name) + 2))) {
nuclear@1 54 free(node);
nuclear@1 55 continue;
nuclear@1 56 }
nuclear@1 57 strcpy(node->fname, dirpath);
nuclear@1 58 if(dirpath[strlen(dirpath) - 1] != '/') {
nuclear@1 59 strcat(node->fname, "/");
nuclear@1 60 }
nuclear@1 61 strcat(node->fname, dent->d_name);
nuclear@1 62
nuclear@16 63 node->aspect = 1.0;
nuclear@11 64
nuclear@20 65 if(dbg_load_async) {
nuclear@20 66 resman_lookup(texman, node->fname, node);
nuclear@20 67 } else {
nuclear@20 68 img_init(&img);
nuclear@20 69 if(img_load(&img, node->fname) == -1) {
nuclear@20 70 img_destroy(&img);
nuclear@20 71 free(node->fname);
nuclear@20 72 free(node);
nuclear@20 73 continue;
nuclear@20 74 }
nuclear@20 75
nuclear@20 76 printf("loaded image: %s\n", node->fname);
nuclear@20 77
nuclear@20 78 node->aspect = (float)img.width / (float)img.height;
nuclear@20 79
nuclear@20 80 glGenTextures(1, &node->tex);
nuclear@20 81 glBindTexture(GL_TEXTURE_2D, node->tex);
nuclear@20 82 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
nuclear@20 83 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
nuclear@20 84 glTexImage2D(GL_TEXTURE_2D, 0, img_glintfmt(&img), img.width, img.height, 0, img_glfmt(&img), img_gltype(&img), img.pixels);
nuclear@18 85 img_destroy(&img);
nuclear@20 86
nuclear@20 87 node->prev = list;
nuclear@20 88 node->next = list->next;
nuclear@20 89 if(list->next) list->next->prev = node;
nuclear@20 90 list->next = node;
nuclear@1 91 }
nuclear@20 92 node->list = list;
nuclear@21 93 node->load_count = 0;
nuclear@1 94 }
nuclear@1 95 closedir(dir);
nuclear@1 96
nuclear@1 97 return list;
nuclear@1 98 }
nuclear@1 99
nuclear@1 100 void free_thumbs(struct thumbnail *thumbs)
nuclear@1 101 {
nuclear@1 102 if(!thumbs) return;
nuclear@1 103
nuclear@1 104 while(thumbs) {
nuclear@1 105 struct thumbnail *tmp = thumbs;
nuclear@1 106 thumbs = thumbs->next;
nuclear@1 107
nuclear@1 108 free(tmp->fname);
nuclear@1 109 free(tmp);
nuclear@1 110 }
nuclear@1 111 }
nuclear@1 112
nuclear@1 113
nuclear@11 114 void update_thumbs(void)
nuclear@11 115 {
nuclear@11 116 resman_poll(texman);
nuclear@11 117 }
nuclear@11 118
nuclear@1 119 void draw_thumbs(struct thumbnail *thumbs, float thumb_sz, float start_y)
nuclear@1 120 {
nuclear@1 121 int vp[4];
nuclear@1 122 float gap = thumb_sz / 4.0;
nuclear@1 123 float x = gap;
nuclear@1 124 float y = gap + start_y;
nuclear@1 125 float view_aspect;
nuclear@1 126
nuclear@1 127 glGetIntegerv(GL_VIEWPORT, vp);
nuclear@14 128 view_aspect = (float)(vp[2] - vp[0]) / (float)(vp[3] - vp[1]);
nuclear@1 129
nuclear@1 130 glMatrixMode(GL_PROJECTION);
nuclear@1 131 glPushMatrix();
nuclear@1 132 glLoadIdentity();
nuclear@1 133 glOrtho(0, 1, 1.0 / view_aspect, 0, -1, 1);
nuclear@1 134
nuclear@1 135 glMatrixMode(GL_MODELVIEW);
nuclear@1 136
nuclear@13 137 thumbs = thumbs->next; /* skip dummy node */
nuclear@1 138 while(thumbs) {
nuclear@1 139 glPushMatrix();
nuclear@1 140 glTranslatef(x, y, 0);
nuclear@1 141
nuclear@1 142 glScalef(thumb_sz, thumb_sz, 1);
nuclear@1 143
nuclear@1 144 glBegin(GL_QUADS);
nuclear@1 145 glColor3f(0.25, 0.25, 0.25);
nuclear@1 146 glTexCoord2f(0, 0); glVertex2f(0, 0);
nuclear@1 147 glTexCoord2f(1, 0); glVertex2f(1, 0);
nuclear@1 148 glTexCoord2f(1, 1); glVertex2f(1, 1);
nuclear@1 149 glTexCoord2f(0, 1); glVertex2f(0, 1);
nuclear@1 150 glEnd();
nuclear@1 151
nuclear@12 152 if(thumbs->tex) {
nuclear@12 153 if(thumbs->aspect >= 1.0) {
nuclear@12 154 glTranslatef(0, 0.5 - 0.5 / thumbs->aspect, 0);
nuclear@12 155 glScalef(1, 1.0 / thumbs->aspect, 1);
nuclear@12 156 } else {
nuclear@12 157 glTranslatef(0.5 - thumbs->aspect / 2.0, 0, 0);
nuclear@12 158 glScalef(thumbs->aspect, 1, 1);
nuclear@12 159 }
nuclear@12 160
nuclear@12 161 if(glIsTexture(thumbs->tex)) {
nuclear@12 162 glEnable(GL_TEXTURE_2D);
nuclear@12 163 glBindTexture(GL_TEXTURE_2D, thumbs->tex);
nuclear@12 164
nuclear@12 165 glBegin(GL_QUADS);
nuclear@12 166 glColor3f(1, 1, 1);
nuclear@12 167 glTexCoord2f(0, 0); glVertex2f(0, 0);
nuclear@12 168 glTexCoord2f(1, 0); glVertex2f(1, 0);
nuclear@12 169 glTexCoord2f(1, 1); glVertex2f(1, 1);
nuclear@12 170 glTexCoord2f(0, 1); glVertex2f(0, 1);
nuclear@12 171 glEnd();
nuclear@12 172 } else {
nuclear@12 173 fprintf(stderr, "invalid texture: %u\n", thumbs->tex);
nuclear@12 174 }
nuclear@12 175
nuclear@12 176 glPopMatrix();
nuclear@12 177 glDisable(GL_TEXTURE_2D);
nuclear@1 178 }
nuclear@1 179
nuclear@1 180 thumbs->layout_pos[0] = x;
nuclear@1 181 thumbs->layout_pos[1] = y;
nuclear@1 182 thumbs->layout_size[0] = thumb_sz;
nuclear@1 183 thumbs->layout_size[1] = thumb_sz;
nuclear@1 184
nuclear@1 185 x += thumb_sz + gap;
nuclear@1 186 if(x >= 1.0 - thumb_sz) {
nuclear@1 187 x = gap;
nuclear@1 188 y += thumb_sz + gap;
nuclear@1 189 }
nuclear@1 190
nuclear@1 191 thumbs = thumbs->next;
nuclear@1 192 }
nuclear@1 193
nuclear@1 194 glMatrixMode(GL_PROJECTION);
nuclear@1 195 glPopMatrix();
nuclear@1 196 glMatrixMode(GL_MODELVIEW);
nuclear@1 197 }
nuclear@11 198
nuclear@11 199 static int load_res_texture(const char *fname, int id, void *cls)
nuclear@11 200 {
nuclear@12 201 struct thumbnail *rdata = resman_get_res_data(texman, id);
nuclear@11 202
nuclear@11 203 assert(rdata);
nuclear@11 204 if(!rdata->img) {
nuclear@11 205 if(!(rdata->img = img_create())) {
nuclear@11 206 return -1;
nuclear@11 207 }
nuclear@11 208 }
nuclear@11 209
nuclear@12 210 if(img_load(rdata->img, fname) == -1) {
nuclear@11 211 img_free(rdata->img);
nuclear@13 212 rdata->img = 0;
nuclear@11 213 return -1;
nuclear@11 214 }
nuclear@11 215 rdata->aspect = (float)rdata->img->width / (float)rdata->img->height;
nuclear@11 216
nuclear@11 217 /* set the resource's data to the loaded image, so that we can use
nuclear@11 218 * it in the done callback */
nuclear@12 219 resman_set_res_data(texman, id, rdata);
nuclear@11 220 return 0;
nuclear@11 221 }
nuclear@11 222
nuclear@11 223 static int done_res_texture(int id, void *cls)
nuclear@11 224 {
nuclear@20 225 struct thumbnail *thumb = resman_get_res_data(texman, id);
nuclear@13 226 int load_result = resman_get_res_result(texman, id);
nuclear@11 227
nuclear@13 228 if(load_result == -1) {
nuclear@13 229 /* returning -1 will remove this resource, the free_res_texture
nuclear@13 230 * destroy handler will be called, which will remove the node
nuclear@13 231 * from the list
nuclear@13 232 */
nuclear@13 233 return -1;
nuclear@13 234 }
nuclear@11 235
nuclear@20 236 if(resman_get_res_result(texman, id) != 0 || !thumb) {
nuclear@12 237 fprintf(stderr, "failed to load resource %d (%s)\n", id, resman_get_res_name(texman, id));
nuclear@11 238 } else {
nuclear@12 239 printf("done loading resource %d (%s)\n", id, resman_get_res_name(texman, id));
nuclear@11 240 }
nuclear@11 241
nuclear@20 242 if(!thumb->tex) {
nuclear@20 243 glGenTextures(1, &thumb->tex);
nuclear@11 244 }
nuclear@20 245 glBindTexture(GL_TEXTURE_2D, thumb->tex);
nuclear@11 246 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
nuclear@11 247 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
nuclear@20 248 glTexImage2D(GL_TEXTURE_2D, 0, img_glintfmt(thumb->img),
nuclear@20 249 thumb->img->width, thumb->img->height, 0, img_glfmt(thumb->img),
nuclear@20 250 img_gltype(thumb->img), thumb->img->pixels);
nuclear@20 251
nuclear@21 252 /* and add it to the list of thumbnails (if it's the first loading) */
nuclear@21 253 if(resman_get_res_load_count(texman, id) == 0) {
nuclear@21 254 thumb->prev = thumb->list;
nuclear@21 255 thumb->next = thumb->list->next;
nuclear@21 256 if(thumb->list->next) thumb->list->next->prev = thumb;
nuclear@21 257 thumb->list->next = thumb;
nuclear@21 258 }
nuclear@11 259 return 0;
nuclear@11 260 }
nuclear@11 261
nuclear@11 262 static void free_res_texture(int id, void *cls)
nuclear@11 263 {
nuclear@13 264 struct thumbnail *thumb = resman_get_res_data(texman, id);
nuclear@11 265
nuclear@14 266 printf("deleting thumb %d: %s\n", id, thumb->fname);
nuclear@14 267
nuclear@13 268 if(thumb) {
nuclear@13 269 if(thumb->tex) {
nuclear@13 270 glDeleteTextures(1, &thumb->tex);
nuclear@11 271 }
nuclear@13 272 if(thumb->img) {
nuclear@13 273 img_free(thumb->img);
nuclear@11 274 }
nuclear@11 275 }
nuclear@13 276
nuclear@13 277 /* remove from the list */
nuclear@13 278 if(thumb->prev) {
nuclear@13 279 thumb->prev->next = thumb->next;
nuclear@13 280 }
nuclear@13 281 if(thumb->next) {
nuclear@13 282 thumb->next->prev = thumb->prev;
nuclear@13 283 }
nuclear@13 284 free(thumb);
nuclear@11 285 }